da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/***********************************************************************
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* This software is part of the ast package *
3e14f97f673e8a630f076077de35afdd43dc1587Roger A. Faulkner* Copyright (c) 1985-2010 AT&T Intellectual Property *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* and is licensed under the *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Common Public License, Version 1.0 *
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin* by AT&T Intellectual Property *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* A copy of the License is available at *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* http://www.opensource.org/licenses/cpl1.0.txt *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Information and Software Systems Research *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* AT&T Research *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Florham Park NJ *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Glenn Fowler <gsf@research.att.com> *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* David Korn <dgk@research.att.com> *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* Phong Vo <kpv@research.att.com> *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin* *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin***********************************************************************/
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "sfhdr.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* Read an unsigned long value coded in a portable format.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin**
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin** Written by Kiem-Phong Vo
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin*/
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#if __STD_C
7c2fbfb345896881c631598ee3852ce9ce33fb07April ChinSfulong_t sfgetu(Sfio_t* f)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#else
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinSfulong_t sfgetu(f)
7c2fbfb345896881c631598ee3852ce9ce33fb07April ChinSfio_t* f;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#endif
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin{
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin Sfulong_t v;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin uchar *s, *ends, c;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin int p;
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin SFMTXDECL(f);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin SFMTXENTER(f, (Sfulong_t)(-1));
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if(f->mode != SF_READ && _sfmode(f,SF_READ,0) < 0)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SFMTXRETURN(f, (Sfulong_t)(-1));
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SFLOCK(f,0);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for(v = 0;;)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { if(SFRPEEK(f,s,p) <= 0)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { f->flags |= SF_ERROR;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin v = (Sfulong_t)(-1);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin goto done;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for(ends = s+p; s < ends;)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { c = *s++;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin v = (v << SF_UBITS) | SFUVALUE(c);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if(!(c&SF_MORE))
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin { f->next = s;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin goto done;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin f->next = s;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chindone:
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SFOPEN(f,0);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SFMTXRETURN(f, v);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}